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  • Users: asv80
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  1. asv80

    WRC 107 - nozzle loads

    This is totally new to me and I would request your advice. We have been provided the allowable forces and moments for weight, seismic and thermal loads for different nozzles and asked to design the nozzles to withstand them. When entering the values for forces and moments in WRC 107...
  2. asv80

    SS 304 / Glycol corrosion resistance

    Does SS 304 have good corrosion resistant in glycol service? The references I checked say they do, but we have an instance where SS 304 glycol heater has split tubes in less than 3 months service and also shows signs pf pitting. Has anyone seen this type of attack before? Thanks in advace.
  3. asv80

    Vacuum Breaker

    Are vacuum breakers required according to any code for a heat exchanger condensing steam in the shell side? We want to install a vacuum breaker as it would protect the shell, however others say there is no requirements per code and hence not needed. Thanks in advance. Excuse for posting in...
  4. asv80

    Vacuum breaker

    Are vacuum breakers required according to any code for a heat exchanger condensing steam in the shell side? We want to install a vacuum breaker as it would protect the shell, however others say there is no requirements per code and hence not needed. Thanks in advance.
  5. asv80

    Hastelloy weldability

    Hi, Can hastelloy (C276 or C22) be welded to stainless steel (304L or 316L)? We need some directions on what process can be used and if it has been done before. Thanks in advance.
  6. asv80

    Heat added by pump

    Hello, How to determine the heat added by a pump of given horsepower to the fluid being pumped? Take, fluid - water (20°C), motor - 100 HP For an approximate estimate I thought, 100 HP is the motor rating and maybe the maximum possible heat that can be added to the fluid would be...
  7. asv80

    What is a horseshoe support?

    We are asked to design a support for a pressure vessel about 8" diameter and 10' long. The type of support specified is "horseshoe support" and we are not certain what it is. Is it an another name for saddle supports? If anyone has any pictures that would hep to. Thanks in advance.
  8. asv80

    Conversion formula for viscosity

    Hello, Can anyone give the conversion formula for viscosity - I need to convert Saybolt Second (SSU) to centi Stokes (cSt)? The actual value required is 100 SSU in cSt. I found some tables on the internet which give the conversion for selected values and also the following formula SSU =...
  9. asv80

    Row & Column names

    Hi, I have a excel spread sheet where the row and column identities like A, B, C... and 1, 2, 3... are hidden. How can I make it show up so that I can adjust the width and height. Thanks in advance.
  10. asv80

    316L SS resistance to chlorides

    What is the maximum ppm of chlorides that a 316L stainless steel can withstand? What about the temperature effects? I searched the internet and saw 1000 ppm but also one which said 3-5 ppm. Can anyone let me know about this? Thanks in advance
  11. asv80

    Shell rolling

    Can anyone direct me to suppliers in the US who can make rolled shells about 24" to 60" in diameter and length from 10' to 24' made of carbon steel and stainless steel. Thanks.
  12. asv80

    Steam Riser

    Can you tell me what is a steam riser - function and suppliers? Thanks
  13. asv80

    High temperature application material

    We have a high temperature heat exchanger application and would like your comments on material selection. The mean metal temperatures is about 1540°F. We are trying inconel as a material and find we get very thick tube sheets. If anyone used materials around these temperatures please give your...
  14. asv80

    Physical properites of polysulfone

    I would like to know the properties of polysulfone. I was able to get a few on the properties on the web. I am looking for the viscosity values. If there are different types of polysulfones, then some typical values would help. Thanks in advance.
  15. asv80

    Expansion joint need

    What is the criteria to decide if an expansion joint is required or not in a shell and tube exchanger? What values of mean metal temperatures are considerd the limiting values for the need for expansion joint? If this is available in a code, could you give the reference. Thanks in advance, ASV80
  16. asv80

    Horizontal ammonia vapor drums

    Can someone send me the design procedure or calculations to desing a horizontal ammonia vapor drum. I know the flow rate of ammonia, density of the vapor and liquid. But do not have any reference material with me that would describe the procedure. Thanks ASV

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